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New Poser Users Help F.A.Q (Last Updated: 2024 Nov 19 6:44 am)

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Subject: Why does my color inrendered image change color?


Romeo4755 ( ) posted Thu, 26 October 2023 at 6:22 AM · edited Tue, 19 November 2024 at 5:36 AM

Hello.
I am Poser 2014, firefly

I have 3 spotlights pointed at the character . They are all white, but when i render I get some weird green tint from the side. It is on everything - skin and props.

Can you  give me any ideas what is this? thank you in advance.

Scene:

aa2zRoWFicoCWYE5uAqZPSTgirzV7HyIjPS4pc1o.JPG

Rendered:

UfvF3a9SNGbRxGBjEbAi0XkPJXxFLhLhbroQZ5Cj.jpg


RedPhantom ( ) posted Thu, 26 October 2023 at 6:44 AM
Site Admin

I might be your environment. What's surrounding your figure?


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donnena ( ) posted Thu, 26 October 2023 at 9:24 AM

do you have gamma turned on?

;>

Andy!


Romeo4755 ( ) posted Thu, 26 October 2023 at 9:25 AM · edited Thu, 26 October 2023 at 9:25 AM

RedPhantom posted at 6:44 AM Thu, 26 October 2023 - #4476842

I might be your environment. What's surrounding your figure?

There is nothing around!

When I turn off 2 side lights it goes natural:
ZtuK8jJX4oNxD5dY92L7syXPFOfinuU5adcdr9Wi.png

Or maybe not? Some greenish hue can still be seen.

But when i turn on the side lights or one of them the green is seen very clearly.

The lights are both white.

W37HeU9FUNm7Pr7dWCnibZfOA7IisnBwP1IAWotN.JPG

zKYYzQVK3PchmUyAIbG54XKTxE94q78QnEK87fqt.JPG


Romeo4755 ( ) posted Thu, 26 October 2023 at 9:27 AM
donnena posted at 9:24 AM Thu, 26 October 2023 - #4476846

do you have gamma turned on?

I am sorry, I don't know gamma with light! I just put spotlights in different places and that's my only skill  in this field. ))


hborre ( ) posted Thu, 26 October 2023 at 10:01 AM

There might be a shader with an ambient channel active.  You will need to enter the Material Room to check on each material zone of the content.  I am detecting a glow on the pants; that might be the culprit.


Romeo4755 ( ) posted Thu, 26 October 2023 at 2:02 PM

hborre posted at 10:01 AM Thu, 26 October 2023 - #4476851

    There might be a shader with an ambient channel active.  You will need to enter the Material Room to check on each material zone of the content.  I am detecting a glow on the pants; that might be the culprit.

I checked them, they are simple materials with just texture , without even any maps. The only object with extra nods and maps is the character himself, he has got greenish diffuse and bluing specular (not my job!) But I rendered him many time from different angles with spotlight and never had this effect
I deleted all light and the made two spotlights anew.
Now there is no green in the render. I do not know what it was!

qQroZwJjKoVAFdFsQSvgqhXmqItfyk0GUaM8ZNbG.JPG

cI2YK9H0rzzxYBJAvanU0dcBKGhqVni4RyGv8jrX.JPG


hborre ( ) posted Thu, 26 October 2023 at 3:17 PM

Even with Firefly, the shaders need to be optimized for proper rendering.  In your case, the content you are using contains old node arrangements that are no longer relevant or appropriate for the Firefly render engine.  You must understand how the nodes work and reconstruct the shaders to make them behave more efficiently when rendered.  


hborre ( ) posted Thu, 26 October 2023 at 3:58 PM · edited Thu, 26 October 2023 at 3:58 PM

In the screencap below, I outlined some changes that should be performed on the skin shader alone.  It should improve its appearance when rendered.

XZD1XAP5rdCfjSE5GW6HxvIXg0CLpvLgvzgsFkDr.png

The character skin shader was designed with many flaws that in actuality were meant to work with the Poser versions earlier than Poser 2010.  On the PoserSurface node, each plugin channel is a multiplier, they influence the intensity of calculated maps attached to each connector site.  Notice in the image, that there are active Diffuse, Specular, Alternate_Diffuse, and Alternate_Specular channels; this means that the shader is doubling those maps, making them emit an ambient 'glow'.  To correct this, the Diffuse_value and Specular_Value channels should be set to 0 and allow the Alternate_Diffuse and Alternate_Specular to perform the calculations for the skin texture.  This will also give a more natural skin tone from the texture maps by getting rid of the color chips that are imparting unrealistic tints.

Set the Translucence_Value to 0, that channel is unnecessary and can cause self-glowing.  There are better ways to give the skin Subsurface Scatter through the SSS nodes introduced in Poser 2010.

Always uncheck the Reflection_Lite_Mult.  When used, it deactivates the Reflection_Color and Reflection_Value channels; this is a holdover from earlier Poser Versions and is unnecessary.

As for the pants, it's a simple shader arrangement and doesn't appear to be a problem.  I would disconnect the map at the Specular_Color channel.  I would also reduce the Diffuse_Value to an approximate value of 0.85; nothing in nature is 100% diffuse.



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